Diem 5.0.0_ALPHA2

Thanks to bug reports in diem-users google group and #diem IRC channel on freenode, many bugs have been fixed.

Diem ALPHA2 is 100% compatible with Diem ALPHA1, so you are encouraged to upgrade your projects.

• override sfApplicationConfiguration->getConfigPaths method to handle better config/dm/*.yml cascade
• made easier to override front actions and components base class
• allowed php command in admin console
• improved error handlers on admin diagrams
• added warnings in mail utilities
• added £media default configuration
• many improvments in installer. No more need to launch dm:setup task after installation.
• moved the doctrine forms unsetAutoFields() call to base classes
• added project setup check in dmContext->initialize
• made dmLogEntry show localhost ip
• made PluginDmMedia->checkFileExists() more robust
• removed deprecated dmFilesystem->whois method
• added graphviz recommandation to dmServerCheck, and removed deprecated ones
• fixed file backup permissions
• fixed usage of mbstring in dmSeoSynchronizer
• improved dmSetupTask
• removed deprecated dmUpgradeTask->upgradeTo500Dev1 method
• improved browser server check stylesheet
• fixed front code editor error handler
• added dmValidatorCssClasses
• added help messages on front text widget
• fixed warning when generating front templates
• improved generated front templates comments
• added min and max values to dmValidatorCssSize
• added save button and confirmation messages to front code editor
• fixed static calls to i18n service in front widget forms
• improved secure page